The RGM-15 was more commonly known as the Regulus II, was an air-breathing, nuclear capable cruise missile that began development in 1957. This film, made by manufacturer Chance Vought, chronicles the testing and development of the supersonic, jet powered missile at Edwards Air Force Base. It culminates in the one and only launch of the bird off of a submarine, the USS Grayback (SSG-574) in 1958. This film also shows some of the amazing JATO launches of the missile, and the remote control landings of the Reg II test vehicle. Chance Vought used this procedure to help keep costs down, recovering the missile so that it could be used repeatedly.